Feeding mechanism for bakers&#39; ovens.



W. F. PETERSEN. FEEDING MECHANISM FOR BAKERS OVENS.

A PPLIOATION FILED AUG.28, 1912.

Patented May 5, 1914.

719w; a! M W. P. PETERSEN. FEEDING MECHANISM FOR BAKERS OVENS.

APPLICATION FILED AUG. 28, 1912.

Patented May 5, 1914 4 SHEETS-SHEET 2.

v.4 v KW I Pvt W. F. PETERSEN.

FEEDING MECHANISM FOR BAKERS OVENS.

APPLICATION FILED AUG. 28, 1912.

Patented May 5, 1914.

4 SHEETS-SHEET 3.

macro W. F. PETERSEN FEEDING MECHANISM FOR BAKERS OVENS, APPLIGATION FILED AUG. 28, 1912.

Patented May 5, 1914 4 SHEETS-SHEET 4.

WILLIAM F. PETERSEN,

OF CHICAGO, ILLINOIS.

FEEDING MECHANISM FOR BAKERS OVENS.

Specification of Letters Patent.

Patented May 5, 1914.

Application filed August 28, 1912. Serial No. 717,495.

1 b all w/mm, it may concern:

Be it known that I, lVILLIAM F. PETER? sex, a citizen of the United States, residing at (.hicago, in the county of Cook and State of Illinois, have invented new and useful Improvements in Feeding Mechanism for Bakers Ovens, of which the following is a full, clearfarnd exact description.

My invention relates to bakers ovens and n1: rticularlv to the type known as the Widemouth oven wherein the feed'door to the baking-chamber extends entirely across the front of said chamber as disclosed in Letters Patent, of the United States No. 975,889, granted to me November 15th, 1910, for im provements in bakers ovens.

Broadly stated, the object of my invention is to provide a bakers oven with automatic means for feeding the dough into the baking-chamber in an expeditious manner, and

the particular objects of said invention are to arrange this mechanism in a compact manner, with as few complicated parts as possible and to construct the same so that it can be readily and economically applied to various ovens now in use without special machinery.

A further object is to construct this feeding mechanism in such manner that the operation of'the same may readily be reversed in order to remove the loaves of baked bread from the oven without the necessity of employing additional mecha'nical elements,in other words, the feeding of the oven and the discharge of the baked products will be performed by the same mechanism.

These and other objects I accomplish by the means and in the manner hereinafter fully described andas more particularly pointed outin the claims, reference being had to the accompanying drawings, forming a part hereof, in which,

Figure 1 is a vertical side elevation of the front portion of an oven showing my feeding mechanism applied thereto, Fig. 2 is a vertical front elevation thereof showing only the left-hand portion of the mechanism, that on the opposite end being a substantial duplicate. Fig. 3 is a top plan View of my invention showing the oven in horizontal section through the baking-chamber. Fig.

-l is atransverse section of the feed worin' showing the shelf in engagement therewith and illustrating the details of construction of the link-belt and means carried thereby for removably supporting the shelf. Fig. 5 1s a top plan view of'the parts shown in Fig. i. Fig. 6 is a vertical fragmentary section of the upper portion of the mechanism taken on line 6-6, Fig. 3. Fig, 7 is an enlarged detail view of one of the discharging plungers and its bearing. Fig. 8 is a perspective view of one of the actuating cams.

Referring to the'drawings, A represents the front wall of a bakers oven, B the baking-chamber thereof, and C the door opening through which access and light is had to said baking-chamber. ,For the purpose of convenience, I have shown and described my invention applied'to a widemouth oven wherein the door C extends across the entire width of the front of the baking-chamber B, thus affording access and light to the entire chamber and permitting the peeling-to be performed straight in' and out parallel to the side-walls of the bakingchamber.' It will be understood, of course, that my invention is applicable to ovens of any other well-known types without altering the mechanism herein shown and described and Without departing from the spirit of mv' invention as set forth in the claims.

Mounted in front of the oven door, and preferably beyond the vertical planes of the ends of said door are two correspondinglyshaped vertical standards or side-frames 1, 1, that support the bearings of the various shafts and other elements used in connection with my invention. These side-frames are substantially rectangular in shape and have aportion of their upper edges de pressed so as to form slightly elevated plateaux at each end of said top edge on which suitable bearing blocks 2,2, are secured for the horizontally disposed parallel shafts 3, 3. These shafts extend through their bearings and have suitable sprocket-wheels 4, 4, secured to their extended ends.

Mounted in suitable hearings in the lower port-ion of frames 1, 1, and preferably with their axes in planes parallel to the axes of the upper shafts, are two horizontally disposed shafts 5, 5, that extend bey0nd"t-heir bearings and have sprocket-wheels 6, 6, secured to their outer extended ends.

The sprockets on each side of the frames are coiinected by suitable link-belts 7, 7, so that they are all driven in unison. The details of these link-belts are shown in Fig. 4 and 5 of the drawings, and preferably comprise a plurality of links which are connected at equal distances apart by specially constructed links 8 which latter have lateral studs 8 projecting from one side edge. These studs enter a hollow boss projecting laterally from the upper portion of a rectangular shaped metallic hanger 8". In order to retain the hanger 8 in position on the stud a slot or groove 8 is cut in the outer surface of said stud and a screw 8 having a reduced lower end is tapped into the boss of the hanger until the reduced portion of the screw enters said groove or slot 8. The hanger is, preferably, provided with a vertically disposed slot 8 that extends from the upper edge thereof to a point about the center of length of said hanger and is provided with a restricted opening 8 in its surface opposite its pivotal boss for the reeption of a headed stud 9 projecting laterally and horizontally from the outer end of a bracket 9 to the end of a shelf 9. These shelves 9 are removably mounted on the link-belt and are approximately the same length as the oven door so'that the pans of dough may be fed to and discharge from the baking-chamber. Said shelves comprise an elongated rectangular plate and have brackets 9 secured'to each end that are provided with an outwardly projecting lug or boss 9 having a segmental shaped undercut threaded recess 9 formed in their under surfaces and beyond this boss 9 the stud 9*, (above described) extends. These shelves are adapted to receive the unbaked dough in pans from a suitable traveling apron, as will hereinafter be fully described, and then convey said material to the mouth of the oven where the shelves are automatically removed from the link-belt by having their threaded recesses 9 engage with worm-shafts 10, extending from the rear Wall of the baking chamber into and through the oven to suitable bearings 11, in the top of the sidefraines 1.

-There are, preferably, two worm-shafts 10, one adjacent each side or end wall of the baking-chamber and their outer ends extend beyond their bearings and have suitable miter or beveled pinions 12, secured thereto. Pinions 12 l are driven by larger beveled gears'13, on the ends of a horizontally disposed shaft 1a journaled on top of the sideframes, which shaft derives motion through the medium of a sprocket 15 on the outer end thereof, and a chain 16 that connects with a suitable sprocket 17 on a horizontally disposed drive-shaft 18 journaled in the lower portion of the side-frames. In order to time the feed of these worms 10 so that the shelves may he placed thereon in succes- 1 noeaeoo siveorder and in close proximity to each other, the beveled gears 13 are mutilated (as shown in Fig. 3) so that their teeth will engage the pinions l2 portion of a. revolution and then be disengaged. This gives the worm shafts an intermittent rotary movement that is sufficient to move the shelves thereon just far enough away from the linkbelts to escape the next shelf being carried toward the worms by said link-bclts.

In front of the side-frames and prefer ably extending across the entire width of this oven, I build a solid wall 19 of masonry or} the like, the top of which terminates belo the horizontal plane of the bottom of th oven door. In bakeries where a battery ofl a number of ovens are employed side by si e this wall, preferably, extends in front of=the entire length of the ovens and has diriding walls or partitions that separate the mechanism one from another.- However, where only one oven or baking-chamber is employed this wall is built continuous, out from each end of the oven wall and along the front of the same. This wall forms a compartment that retains an amount of heat sufficient to warm the shelves and prevent the chilling of the dough as it is fed to the oven. At suitable points along thetop of wall 19 are mounted several vertically disposed metallic standards 20 and the op-' posite disposed standards are connected by cross-pieces 21, forming a support for a floor or planking 22 extending the entire length of the top of said wall. The traveling on this planking is a canvas-belt conveyer or apron that moves longitudinally thereon to one end where it passes down on the end of the planking and mid rthe same Where its return movement isguided by a plurality of rollers 2e having their ends journaled in hearings in the standards 20.

The conveyer is driven by suitable belts and gears from the main drive-shaft of the mechanism or direct from the line shaft (not shown). Suitable brackets 30 are bolted or otherwise secured to the front wall 19 adjacent each end thereof and are each provided in their upper horizontal surfaces with bearings 31 and 32 for a suitable horizontally disposed plunger 33. Bearings 32 are preferably substantially rectangular shaped in cross-section and have their vertical walls provided with longitudinally disposed alining grooves 32, and having longitudinally disposed slots 36 in their under surfaces. The portion of plunger 33 operating in these bearings 32 is also rectangular and have tenons or ribs 32h that slide in grooves 32- while their. opposite ends are provided with heads 3% in which a translversely disposed horizontal shifting bar 35 that connects the same is mounted. Another smaller bracket 37 is bolted to the wall 19 just below and in vertical alinenient with each of the before-mentioned brackets and said smaller brackets have pivotal bearings in their outer ends for elongated reciprocale levers 38 fulcrumed adjacent their lower ends that have their upper ends connected by links 39 to the lugs 33 depending from their respective plungers through slots 36. The ends of the levers below their fulcrums are, preferably, bent laterally and bifurcated to journal anti-friction rollers 40. Le vers 38 are actuated by cams ell slidably mounted on but rotatable with a horizontally disposed shaft. 42 and said cams each have a lateral shoulder an that is concentric to all points with the aXis of rotation of the cam. Cams 41 are feathered on shaft 42 having bearings an secured to the wall 19 and said shaft is driven by a sprocket ll connected by a chain ll to a suitable source of driving power or directly to a shaft carrying a corresponding cam mounted in the side-frames as will hereinafter be fully de scribed. When the cams are rotated and the rollers 40 are engaged thereby they will actuate and move the upper ends of the levers 38 toward the oven and move the plungers in the same direction causing the transverse shifting bar to engage and shove the pans of dough off the conveyer apron onto one of the shelves 9. Suitable expansion coiled springs 33 are provided that tions after each reciprocation thereof.

The shelves, as fast as they are loaded are moved by the link-belts upwardly a short distance, then horizontally to a point over the worm shafts, where they are then lowered vertically until the threaded recesses at the ends of said shelves seat on said shafts and convey said shelves into the oven. Af-

ter the oven has been fully peeled or charged, the feeding mechanism is stopped although the conveyer apron may be allowed to operate to carry the loaded pans to the next oven doorin the event of the feeding mechanism being en'iployed in connection with more than one oven as in a large Laking establishment. As soon as the baking process has been completed the 'driving mechanism is reversed in any suitable manner and the cams ll shifted longitudinally on their shaft so that the concentric portion only will be engaged by the end of levers 38. At the same time suitable discharge plungers 43 are thrown into operation. These latter plungers correspond in construction and operation to plungers 33 and are mounted in bearings ti and te on the upper edge of brackets 45 bolted, preferably, to the front-wall of the oven slightly below the horizontal plane of the sill of the door. Bearings 44 have slots an out in their under surfaces through which the lateral lugs id pass from the under side of plungers 43. The interior side walls of these bearings are, preferably, provided with aprons 4A in which tenons 43- of the plungers slide the same as the bearings and plungers before de scribed. The actuating levers 46 are fulcrurned near their lower ends on a horizontal shaft 47 journaled in bearings 18 on the webs of the sideframes. Slightly below the pivotal shaft at? a horizontal shaft 17, before mentioned, is journaled in the side-frames and has cams 5O feathered on each of its ends so that they rotate with said shaft but have a longitudinal movementindependent thereof. Said cams each have a concentric shoulder similar to those on the cams e1, above described, so that when they are shifted on their shaft the rollers 51 on the lower ends of levers 46 will not be actuated and their respective plungei's will remain sta tionary. The ends of the plungers 4&3 have bifurcated heads 52in which a transverse shifting bar is secured. When it is desired to discharge the oven of the baked bread the levers 46 are actuated by their re spective cams and the link-belt and worms being reversed, the shelves'containing the baked bread will be moved through the oven where said shelves will be picked up by the link-belt and conveyed to a point opposite the conveyor apron at which time plungers 33, being stationary, plunger-s will operate and shove the pans off the shelf onto said conveyer apron where they travel to a point to be removed by hand.

One of the sprocket shafts 3 is preferably extended beyond its hearing at one end where it has a large gear. 55,.secured to its extended end, whicn gear is driven by a pinion 56 fast on a line or drive-shaft 57. This comprises the main driving means for the devices, and in order to drive the camshafts a sprocket 58 is mounted on the drive shaft and isconnected by a chain 59 to a sprocket G0 on the extended end of cam-shaft 18, which latter in turn drives cam-shaft 42 by chain ll and also the beveled gear shaft 14 a by a chain 16.

I have neither shown nor described any particular reversing mechanism for it is quite obvious that any wellknown and convenient type that is adapted for use in this connection may be employed as desired. Neither have. I illustrated nor described the shifting mechanism for the cams that actuate the plunger levers. for these too may be of any conveinent type.

/V hat I claim as new 1SZ- 1. The combination in a bakers oven, of Y reversible chains, removable shelves suspended thereon reversible worms for rc-v lIlOVlDg sald shelves Irom said chains and and. back to said apron,

from salcl apron to sand shelves, and. a separate plunger 1n honzontal ahneg ing the load a plunger for p ushment with sand firstmentioned plunger for pushing the apron, one 0 load ofi said shelves onto said if said plungers adapted .to 0perate when the other plunger is stationary.

I l WILLIAM F; PETERSEN. itnesses WILLIAM H. YORKF E. K. LUNDY. 

